The complexity of biodiesel aging has shown that the mechanism needs further research. rate product formation and associated interactions can help improve fuel quality. Since is a multicomponent system constant changes occur in chemical environment, which yield products must be more detail. Particularly under observation was correlation between peroxides epoxides. In addition, it critical influ...

The immune system is one of the most important things that need to be preserved in midst Corona Virus Disease 2019 (Covid-19) pandemic. Consuming components compounds contained Madeira vine (Binahong) leaf oil right and regular doses can way enhance system. This obtained by carrying out extraction process with reflux method on leaf. study aimed determine optimal time temperature process. was ca...

Previous studies on hydroformylation of methyl oleate with rhodium and triphenylphosphine or triphenylphosphite have led to a laboratory process for recycling the precious metal catalyst. Another catalyst recycling process has now been studied as the basis for converting commercially available oleic acid into the enol ether of methyl formylstearate. The process involves one-step esterification-...

Methyl oleate, an example of a FAME (fatty acid methyl ester), was produced by oleic (OA) photoesterification with TiO2 and UVA light. Different parameters were evaluated optimised: catalyst pretreatment, temperature (25–65 °C), loading (1–30 % w/wOA) : alcohol molar ratio (1 3–1 55). Response surface quadratic methodology obtained central composite rotational design (RSM-CCRD) used to evaluate...

Azanza garckeana is a tropical fruit plant found in Africa. Its edible used as food or herbal medicines, while the seeds are discarded. In an attempt to turn waste wealth and obtain useful substances from it, this study was carried out identify bioactive compounds with nutritional health-promoting benefits present methanol aqueous extracts of fruit. Freshly harvested few fruits A. containing we...

are secreted by queen brood at half the rate found for worker brood. Methyl oleate, repellent to the mite, is secreted in large amounts compared with the attractive esters. Quantitative and qualitative differences in the esters present on worker, drone, and queen broods could partially explain the weaker attraction exerted by queen brood on the mite, compared with the attractive effects of work...

Rat pancreatic juice cholesterol ester hydrolase (EC 3.1.1.13) has been purified 600-fold by sequential precipitation with 35 % acetone, diethylaminoethyl cellulose chromatography, and hydroxylapatite chromatography. The purified enzyme gives a single band on polyacrylamide disc electrophoresis and will not hydrolyze methyl butyrate, triolein, or secondary alcohol esters. Data are presented tha...